Common Seahorse vs Spineless cuttlefish

Hippocampus kuda compared with Sepiella inermis

Key Differences

• Common Seahorse is Vulnerable while Spineless cuttlefish is Data Deficient.

Taxonomic Classification

Rank	Common Seahorse	Spineless cuttlefish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Actinopterygii (Ray-finned Fish)	Cephalopoda (Cephalopods)
Order	Perciformes (Perch-like Fish)	Sepiida (Sepiida)
Family	Pomacentridae (Clownfish & Damselfish)	Sepiidae
Genus	Amphiprion (Clownfish)	Sepiella
Species	Hippocampus kuda	Sepiella inermis

Evolutionary Relationship

Common Seahorse and Spineless cuttlefish share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Common Seahorse

VU — Vulnerable

Trend: Decreasing ↓

Spineless cuttlefish

DD — Data Deficient

Physical Characteristics

Attribute	Common Seahorse	Spineless cuttlefish
Diet	Carnivore	—
Average Lifespan	5 years	—
Average Length	17 cm	—
Average Weight	10 g	—

Habitat & Geographic Range

Common Seahorse

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 7 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, India, Indonesia, Japan, and Philippines. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Spineless cuttlefish

Common Seahorse

The common seahorse is found in tropical and temperate waters. Males carry and deliver the babies.